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steel formwork for concrete

steel formwork for concrete

Steel formwork for concrete is a complete modular system consisting of formwork system, fastening system, support system, and accessory system, which is suitable for various structural formworks. Steel formwork for concrete can be divided into standard formwork and non-standard formwork. Steel formwork for concrete typically consists of 80% standard components and 20% non-standard components.

concrete construction steel formwork

● Steel formwork for concrete application

1.Storey heights
Steel formwork for sale is suitable for projects with storey heights of 2.8-3.2 meters.

2.Climbing frame
Steel formwork for sale is suitable for construction methods that combine with external climbing frames.

3.Structural forms
It is suitable for shear wall structures and frame-shear structures.

4.Exterior construction
It is suitable for projects with simple exterior lines and not complicated changes.

5.Comprehensive economy
It is only when used in buildings above 30 stories or for several buildings of the same type, and accumulated use of over 30 times that steel formwork for sale can maximize its economic benefits.

● Steel formwork advantages and disadvantages

 advantage of steel formwork
The components of steel formwork system are designed according to the characteristics of each floor and require a high level of design expertise, but they have low requirements for assembly personnel. As long as there are professionals to provide guidance, assembly personnel can learn to assemble independently in a short time. About 80% of the steel formwork reusable.

Steel formwork for concrete has the following advantages:

1.The concrete poured using steel rod formwork has a good appearance and high quality.

As the formwork is made from aluminum alloy technology, its surface is very smooth and flat, which determines that the concrete surface poured using steel rod formwork technology is very flat and has a good appearance. In addition, the holes between each component are connected by pin and wedges, which can be almost seamlessly connected once the pin and wedges are fixed. This ensures that there is no concrete leakage due to large joints, which can cause honeycomb or rough surfaces on the concrete surface.

steel formwork for concrete slab
column steel formwork design

2.The low cost of steel formwork.
Although the per square meter purchase price of steel formwork in construction is relatively high, when it is used in high-rise buildings or repeatedly recycled, we can see that its average usage cost is competitive compared to other formwork technologies.
3.Steel bar formwork has a short construction period.
Steel bar formwork technology adopts a "fast disassembly system". When the concrete poured on a certain floor reaches a certain strength, the steel waler, formworks are removed and transported from the material feeding port to the upper floor, while ensuring construction safety and retaining the beam prop and adjustable shoring props. In general, the steel bar formwork overhanging structure is equipped with 6 sets of support systems, the beam component is equipped with 4 sets of support systems, and the formwork component is equipped with 3 sets of support systems. Under normal usage conditions, the construction speed can reach pouring 1 layer of concrete every 4 days.

4.Steel formwork for shuttering is easy to install.
Steel formwork decking is made of aluminum alloy material, which has a small density and light weight, with a mass of only 20 ~ 25kg per square meter; The size of steel formwork for shuttering components is small, with a standard size of only 400mm ×1200mm, and one person can easily complete the installation, dismantling, and transportation work.

5 Steel formwork transportation can save a lot of time.
Design of steel formwork uses material feeding ports for material transfer, without the need for unloading platforms, saving a lot of tower crane time. Workers directly transport the disassembled formwork to the upper layer through the material feeding port. In traditional wooden formwork projects, it is necessary to set up an unloading platform, concentrate the disassembled formwork and steel pipes on the unloading platform, and then lift them to the upper floor by tower cranes, which correspondingly increases the cost of mechanical lifting.

steel formwork for concrete for sale
rebar steel formwork

6.Rebar steel formwork has a high load-bearing capacity.
Experimental results have shown that the current rebar steel formwork can bear a load capacity of 30 ~ 50kN/m2, which is fully capable of withstanding the impact force generated on the formwork during concrete pouring. All parts of the formwork system are assembled with aluminum alloy plates. After the system is assembled, it forms a solid frame with excellent stability. If workers strictly follow the instructions for installation, there will be almost no cases of formwork bulging or bursting during the concrete pouring process.
7.Steel formwork is environmentally friendly and does not cause pollution.
Steel formwork is pre-assembled in the factory before being transported to the construction site, thus eliminating the need for cutting and trimming on-site which generates waste and noise. After construction, the disassembled formwork can be reused 200-300 times, and even recycled and melted down, achieving low-carbon, environmentally-friendly, energy-saving, and emission-reducing effects. Moreover, no construction waste is left behind at the site, resulting in a cleaner, safer, and more organized construction environment.
8. There is no need for manual positioning of precast holes. There is no need for manual positioning of precast holes as the steel formwork design takes into account openings. The factory pre-assembly involves uniform numbering for easy and convenient installation, while the precise positioning of the formwork significantly improves the efficiency of installation.

● Disadvantages of steel formwork

1.Professional and technical personnel guidance is required.
Steel formwork panels may encounter various issues in actual construction due to improper assembly, such as insufficient concrete vibration leading to bubbling on the wall surface, incomplete application of releasing agent, etc.
2.The formwork cannot be modified on-site.
During steel formwork design, precise construction and architectural drawings are necessary, which puts high demands on the technical work of the project. Prior preparation for drawing modifications and reviews is required. Once steel formwork panels have been processed and completed, they cannot be modified on-site. If there are any design changes, communication with the manufacturer is necessary to re-evaluate the design, processing, and production, which then will be transported from the factory to the construction site. In contrast, wooden formwork can be easily cut on site.
3.An initial high investment is required.
The unit price per square meter of steel formwork panels is relatively high, so the one-time relative investment in the early stage is relatively large. During the construction process, it is necessary to strengthen management, do a good job of recycling and maintenance, so that it can be used in the next construction site.
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components of steel formwork

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